scholarly journals Zircon trace element geochemistry and Ti-in-zircon thermometry of the Linté Pan-African post-collisional granitoids, Central Cameroon: Constraints on the genesis of host magma and tectonic implications

2021 ◽  
Author(s):  
Patrick Ayonta Kenne ◽  
Sylvestre Ganno ◽  
Timoleon Ngnotue ◽  
Jean Paul Nzenti
Keyword(s):  
Trace Element ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Host Magma ◽  
Pan African ◽  
Tectonic Implications ◽  
Zircon Thermometry

scholarly journals Zircon Trace Element Geochemistry and Ti-in-Zircon Thermometry of the Ngazi-Tina Pan-African Post-Collisional Granitoids, Adamawa Cameroon

2021 ◽  
Vol 12 (04) ◽  
pp. 307-328
Author(s):  
Alexis Hamdja Ngoniri ◽  
Habib Dadjo Djomo ◽  
Timoleon Ngnotue ◽  
Patrick Ayonta Kenne ◽  
Ghislain Ngassam Mbianya ◽  
...  
Keyword(s):  
Trace Element ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Pan African ◽  
Zircon Thermometry

scholarly journals Rare sapphire-bearing syenitoid pegmatites and associated granitoids of the Hamedan region, Sanandaj–Sirjan zone, Iran: analysis of petrology, lithogeochemistry and zircon geochronology / trace element geochemistry

2020 ◽  
Vol 157 (9) ◽  
pp. 1499-1525 ◽  
Author(s):  
Ali A Sepahi ◽  
Hamed Vahidpour ◽  
David R Lentz ◽  
Chris RM McFarlane ◽  
Mohammad Maanijou ◽  
...  
Keyword(s):  
Trace Element ◽  
Trace Element Geochemistry ◽  
Chemical Compositions ◽  
Zircon Geochronology ◽  
Element Geochemistry ◽  
High K ◽  
Igneous Origin ◽  
Plutonic Complex ◽  
Sanandaj Sirjan Zone ◽  
Zircon Thermometry

AbstractPegmatites and associated granitoids are integral parts of the Alvand plutonic complex in the Sanandaj–Sirjan zone, Iran. Whole rock major- and trace-element lithogeochemistry together with zircon U–Pb geochronology and zircon geochemistry are examined to evaluate the petrogenesis of sapphire-bearing pegmatites and other peraluminous pegmatites in the region. Pegmatites vary in their chemical compositions from mostly peraluminous, high-K calc-alkaline to shoshonitic signatures. A rare variety of extremely peraluminous sapphire-bearing syenitoid pegmatite (Al2O3 > 30 wt %; A/CNK > 2) exists. This silica-undersaturated pegmatite and its sapphire crystals have a primary igneous origin. U–Pb zircon geochronology of three separate samples from this pegmatite indicates the following ages: 168 ± 1 Ma, 166 ± 1 Ma and 164 ± 1 Ma. The zircon grains have notable amounts of Hf (up to 17 200 ppm), U (up to 13 580 ppm), Th (up to 5148 ppm), Y (up to 4764 ppm) and ∑REE (up to 2534 ppm). There is a positive correlation between Hf and Th, Nb and Ta, U and Th, and Y and HREE and a negative correlation between Hf and Y values in the zircons. These zircons exhibit pronounced positive Ce anomalies (Ce/Ce* = 1.15–68.06) and negative Eu anomalies (Eu/Eu* = 0.001–0.56), indicative of the relatively oxidized conditions of the parent magma. Ti-in-zircon thermometry reveals temperatures from as low as ~683 °C up to ~828 °C (average = 755° ± 73 °C). Zircon and monazite saturation equilibria are also consistent with these temperatures. Zircon grains are magmatic (average La < 1.5, (Sm/La)N > 100 and Th/U > 0.7), with chemical characteristics similar to zircons from continental crust.

Trace-element geochemistry and U–Pb dating of perovskite in kimberlites of the Lunda Norte province (NE Angola): Petrogenetic and tectonic implications

2016 ◽  
Vol 426 ◽  
pp. 118-134 ◽  
Author(s):  
Montgarri Castillo-Oliver ◽  
Salvador Galí ◽  
Joan Carles Melgarejo ◽  
William L. Griffin ◽  
Elena Belousova ◽  
...  
Keyword(s):  
Trace Element ◽  
Trace Element Geochemistry ◽  
Element Geochemistry ◽  
Tectonic Implications
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